COMP: CommandIterationUpdate has field whose type uses anonymous namespace.

For the warning:

  /scratch/dashboards/Linux-x86_64-gcc4.1/ITK/Examples/Registration/ImageRegistrationHistogramPlotter.cxx:391:
  warning: 'CommandIterationUpdate' has a field
  'CommandIterationUpdate::m_JointHistogramWriter' whose type uses the
  anonymous namespace

Change-Id: I63adee3894104d6d755477357526fa25e29bb6c0
Merge topic 'HistogramPlotter-cxx'

31dd0d8d COMP: CommandIterationUpdate has field whose type uses anonymous namespace.
COMP: Do not use -fno-ipa-cp-clone with clang.

The flag is only known to have issues with GCC 4.8.2.  Disable for clang to
avoid the warning:

  clang: warning: argument unused during compilation: '-fno-ipa-cp-clone'

Change-Id: If81b65d315b43d342ffa430fa17a202f19305b7c
Merge topic 'clang-no-ipa-cp-clone'

ac0d3d71 COMP: Do not use -fno-ipa-cp-clone with clang.